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为防治露天煤矿矸石自燃,以粘土和水泥为主要固料,以浆液粘度、容重及含水率三个指标为标准,配制出密度为1.48g/cm3、粘度为33s的粘土水泥浆液,并在矸石场进行了注浆试验。通过测量挖掘断面,得到了不同注浆量的浆液扩散范围以及注浆充填矸石空隙的实际效果。试验采用的浆液配方设计方法和浆液配比参数及注浆工艺参数,为矸石自燃治理注浆工艺的现场实际应用,提供了技术依据。
In order to prevent spontaneous combustion of open-pit coal gangue, clay and cement are taken as the main solid materials, clay slurry with a density of 1.48g / cm3 and a viscosity of 33s is prepared by using three indexes of slurry viscosity, bulk density and water content as standards, Field grouting test. By measuring the excavation section, the range of grout diffusion with different grouting amount and the actual effect of filling grouting void were obtained. The slurry formula design method and slurry proportioning parameters and grouting process parameters adopted in the experiment provide the technical basis for the practical application of the grouting process for spontaneous combustion of gangue.